I hear you loud and clear. It is tiring. Zara too can wait ages in the morning until I feed her. What is Serens bed time? Is there some cough medicine or something that you can give her to help with the coughing, or would a vaporiser help? What does the Dr say about the coughing?
Perhaps she isn't taking too much milk because she isn't feeling 100% - but I wouldn't worry too much about that, my Dr and CHN said if a baby wants to eat solids, give them solids. Just make sure it is a wide variety, like a toddler diet really.
Zaras day was at home with me yesterday and she is grumpy - teething, frustrated at not crawling, and starting to cry when she sees me walk away from her - so yes, just a wonderful day. She slept good last night though, so hopefully today will be a bit better, and I can feel a new tooth, not enough to say officially through, so maybe this whingeing will be over with soon.